There have been numerous custom-made Switch accessories over the years, but it seems that pinball-style devices are some of the most popular. Japanese creator Far East Pinball has taken a crack at their own design, which you can see in action above.
The device is powered via USB cable, and all you do is slot in the Switch, and then plug a cable into Switch’s Type-C port. After that, you're able to enjoy various pinball games in TATE mode, but with controls that are mimic a pinball machine. The buttons on the side of the device let you use the flippers, and giving the unit a shake lets you tilt the game, just as you could in the arcades.
Far East Pinball is actually selling these devices, but they're currently out of stock. The entire project is a one-man team, so it might take awhile until a few more are up for grabs.